FIRST RECORDS OF THE CADDISFLY FAUNA (INSECTA: TRICHOPTERA) FROM THE KARADAK MOUNTAINS, WESTERN BALKANS

NAT. CROAT. VOL. 27 No 1 143-151 ZAGREB June 30, 2018 original scientific paper/izvorni znanstveni rad DOI 10.20302/NC.2018.27.7 FIRST RECORDS OF THE CADDISFLY FAUNA (INSECTA: TRICHOPTERA) FROM THE KARADAK MOUNTAINS, WESTERN BALKANS Astrit Bilalli 1, Halil Ibrahimi 2* & Milaim Musliu 3 1 Faculty of Agribusiness, University of Peja Haxhi Zeka, UÇK street, 30 000 Pejë, Republic of Kosovo 2 Department of Biology, Faculty of Mathematics and Natural Sciences, University of Prishtina Hasan Prishtina, Mother Theresa p.n., 10 000 Prishtinë, Republic of Kosovo 3 Institute for Environment and Health, Faculty of Contemporary Sciences and Technologies, South East European University, Ilindenska 335, 1 200 Tetovo, Macedonia Bilalli, A., Ibrahimi, H. & Musliu, M.: First records of the caddisfly fauna (Insecta: Trichoptera) from the Karadak Mountains, Western Balkans. Nat. Croat., Vol. 27, No. 1, 143-151, Zagreb, 2018. The caddisfly fauna of the Karadak Mountains in the border area between Kosovo and Macedonia was previously completely unknown. We collected adult caddisfly specimens occasionally, from September 2016 to June 2017, in sixteen localities in this area. During this investigation we found 18 species belonging to the following families: Limnephilidae, Rhyacophilidae, Philopotamidae, Uenoidae and Leptoceridae. The autumnal Limnephilid species Chaetopteryx gonospina was found in one locality only, in Dëbëlldeh village in southern Kosovo, representing the first record for Kosovo. Rhyacophila fischeri, Rhyacophilidae, was found in Tanushë village in northeastern Macedonia, the first record from Macedonia. This paper is a contribution to knowledge of the distribution of Trichoptera from Kosovo and Macedonia. Keywords: Trichoptera, Kosovo, Macedonia, Chaetopteryx gonospina, Rhyacophila fischeri Bilalli, A., Ibrahimi, H. & Musliu, M.: Prvi nalazi faune tulara (Insecta: Trichoptera) s planina Karadak, zapadni Balkan. Nat. Croat., Vol. 27, No. 1, 143-151, Zagreb, 2018. Fauna tulara planina Karadak s graničnog područja između Kosova i Makedonije bila je prethodno potpuno nepoznata. Nasumično smo prikupljali odrasle jedinke od rujna 2016. do lipnja 2017. na 16 lokaliteta na tom području. Tijekom ovog istraživanja pronašli smo 18 vrsta iz sljedećih porodica: Limnephilidae, Rhyacophilidae, Philopotamidae, Uenoidae i Leptoceridae. Jesenska vrsta iz porodice Limnephilidae, Chaetopteryx gonospina pronađena je samo na jednom lokalitetu, u selu Dëbëlldeh u južnom Kosovu, i to je njen prvi nalaz za Kosovo. Rhyacophila fischeri, porodica Rhyacophilidae, pronađena je u selu Tanushë u sjeveroistočnoj Makedoniji i to je njen prvi nalaz za Makedoniju. Ovaj rad je doprinos poznavanju rasprostranjenosti tulara na Kosovu i Makedoniji. Ključne riječi: Trichoptera, Kosovo, Makedonija, Chaetopteryx gonospina, Rhyacophila fischeri INTRODUCTION According to current knowledge there are more than 15 000 species of the aquatic insect order Trichoptera worldwide (Morse, 2017). In Europe, more than 1 100 species have * Corresponding author: halil.ibrahimi@uni-pr.edu

144 Bilalli, A. et al.: First records of the caddisfly fauna (Insecta: Trichoptera) from the Karadak Mts, Western Balkans been recorded (e.g. Malicky, 2004; Oláh, 2010; Wiberg-Larsen, 2008). Within Europe, the Balkan Peninsula is one of the most important biodiversity hotspots for caddisflies with a high rate of endemism due to the geological, hydrological and climatic features of the area (e.g. Previšić et al., 2013; Schmidt-Kloiber et al., 2017). However data for many areas in the Balkans are still lacking. During the past decade, this order of aquatic insects has taken more attention in studies related to taxonomy, ecology and biogeography (e.g. Graf et al., 2008; Ibrahimi et al., 2012A, b, 2013, 2014a, b; Kučinić et al., 2013; Malicky, 2005; Oláh, 2010; Oláh et al., 2011; Oláh et al., 2013a, b, c; Previšić et al., 2014; Vučković et al., 2011; Waringer et al., 2009; Živić et al., 2006). Several areas in Kosovo have been intensively investigated during the past years for Trichoptera (Gashi et al., 2015; Ibrahimi et al., 2012a, b, 2013, 2014a, b; Oláh et al., 2010, 2013a, b) while in Macedonia this order of aquatic insects was investigated only sporadically (Oláh, 2010, 2011; Oláh & Kovács, 2013, 2014; Rimcheska et al., 2015; Slavevska-Stamenković et al., 2016). Several new species were described recently, from both countries, such as Annitella jabllanicensis Oláh, 2014, Chaetopteroides kosovarorum Ibrahimi & Oláh, 2013, Drusus dardanicus Ibrahimi, Vitecek & Kučinić, 2015, Drusus krpachi Kučinić, Graf & Vitecek, 2015, Drusus sharrensis Ibrahimi, Previšić & Vitecek, 2015, Potamophylax alsos Oláh, 2014, Potamophylax fules Oláh & Ibrahimi 2013, Potamophylax lemezes Oláh & Graf, 2013, Rhyacophila liutica Oláh, 2010, (Ibrahimi et al., 2015a, 2016; Oláh et al., 2013a, 2013b; Oláh & Kovács, 2014; Oláh, 2010; Vitecek et al., 2015). The goal of this paper is to contribute to the faunistic list of caddisflies of Kosovo and Macedonia and in particular to provide the first insights into the caddisfly fauna of the Karadak Mountains, which have hitherto provided no records of caddisflies. MATERIAL AND METHODS Data sampling and processing Adult caddisfly specimens were collected with entomological nets, handpicking and ultraviolet light traps. Ultraviolet light was placed above a white pan of 60 cm in diameter, filled with water and a few drops of detergent. The sampling was carried out occasionally between September 2016 and June 2017. Collected samples were preserved in 80 % ethanol. The specimens were identified under a stereomicroscope with determination keys from Malicky (2004) and Kumanski (1985, 1988). Female specimens of the genus Hydropsyche Pictet, 1834 were identified only up to generic level due to the difficulties in identifying the species accurately. During our investigation we found a single male specimen of the genus Chaetopteroides Kumanski, 1987 most probably belonging to Chaetopteroides kosovarorum described recently from Kosovo (Oláh et al., 2013b). However more specimens are needed in order to compare it with species of this genus. A single male specimen belonging to the genus Micropterna Stein, 1873 was found during this investigation at Station S1, which is a tributary of Morava River in Binçë village in Kosovo, and it was identified only up to the generic level. The aedeagus and parameres of this specimen are slightly damaged while all other characteristics are mostly similar to those of Micropterna testacea (Gmelin, 1789), and clearly different from those of Micropterna nycterobia McLachlan, 1875. More specimens from this locality are needed in order to identify its taxonomic status precisely. The collection is deposited at the Laboratory of Zoology of the Faculty of Natural and Mathematics Sciences, University of Prishtina, Republic of Kosovo. Systematic presentation was done according to Morse (2017).

Nat. Croat. Vol. 27(1), 2018 145 Fig. 1. Map of the sampling stations in the Karadak Mountains. Detailed data are presented in Tab. 1. Study area Sampling was carried out in 16 localities in the Karadak Mts. (Fig. 1 and Tab. 1). This mountainous area is shared between Kosovo and Macedonia and it is known for numerous watercourses, springs, rivulets and rivers. Freshwater ecosystems of this area belong to the Black Sea Basin and the Aegean Sea Basin. Eleven of the sampling stations are located in Kosovo in the municipalities of Gjilan, Viti, Kaçanik and Hani i Elezit and five in Macedonia in the municipalities of Čučer-Sandevo and Kumanovë (Tab. 1). The highest peaks in the Karadak Mts. are Maja e Kopilaqës (1.490m), Maja e Zezë (1.219m) and Maja Topan (1.178m). The area of the Karadak Mts. is bordered by the Sharr Mts. in the north while in the south they border with the Jakupica Mts.

146 Bilalli, A. et al.: First records of the caddisfly fauna (Insecta: Trichoptera) from the Karadak Mts, Western Balkans Tab. 1. Locality data for the 16 sampling stations of caddisflies at the Karadak Mountains in Kosovo and Macedonia. Code Sampling Stations Latitude N Longitude E Altitude m S1 Tributary of Morava River in Binçë village, Kosovo 42.29476 21.37150 570 S2 Tributary of Morava River in Shushtë village, Kosovo 42.28113 21.35911 573 S3 Morava River in Viti town, Kosovo 42.30628 21.36202 520 S4 Tributary of Morava River in Letnicë village, Kosovo 42.28727 21.45736 625 S5 Tributary of Vardar River in Brodec Village, Macedonia 42.14192 21.4403 912 S6 Tributary of Zhegër stream in Zhegër village, Kosovo 42.31572 21.53148 640 S7 River in Dëbëlldeh village, Kosovo 42.25454 21.40008 982 S8 Llapushnicë River in Pogragjë village, Kosovo 42.42533 21.55426 483 S9 Lugu i Kopilaqës streamlet in Dëbëlldeh village, Kosovo 42.24605 21.43110 1160 S10 Streamlet before Brodec village, Macedonia 42.130803 21.429318 652 S11 Morava River in Korbliq village, Kosovo 42. 229795 21. 336078 730 S12 Zhegër stream in Stanqiq village, Kosovo 42.25506 21.55029 836 S13 Stream in Dërmjak village, Kosovo 42.17264 21.31582 625 S14 Stream above Brodec village, Macedonia 42.160165 21.448974 1350 S15 Streamlet before Tanushë village, Macedonia 42.23356 21.42733 1358 S16 Stream in Tabanovc village, Macedonia 42.219713 21.697831 380 RESULTS During this investigation we found 18 species belonging to 5 families and 13 genera of Trichoptera. The distribution of species within families is as follows: Limnephilidae (10), Rhyacophilidae (4), Philopotamidae (2), Uenoidae (1) and Leptoceridae (1). The highest number of specimens comes from three species of the Rhyacophilidae family: Rhyacophila fasciata Hagen, 1859 (39 specimens), R. fischeri Botosaneanu 1957 (14 specimens) and R. obliterata McLachlan, 1863 (12 specimens) while all other species were collected with fewer than ten specimens. The following five species were found with one specimen only each during the whole investigation period: Chaetopteryx bosniaca Marinkovic-Gospodnetic, 1959, Chaetopteryx gonospina Marinkovic-Gospodnetic, 1966, Drusus botosaneanui Kumanski, 1968, Micropterna sp., Mystacides azurea (Linnaeus, 1761) and Stenophylax meridiorientalis Malicky, 1982. Three species (Halesus digitatus (Schrank, 1781), Rhyacophila fasciata and R. obliterata) were the most widespread and were collected at five localities each, while the rest of the species were found in fewer localities. Nine species were recorded in only one locality each (Chaetopteryx bosniaca, Chaetopteryx gonospina, Drusus botosaneanui, Micropterna sp., Mystacides azurea, Potamophylax pallidus (Klapalek, 1899), Rhyacophila nubila Zetterstedt, 1840, Stenophylax meridiorientalis and Thremma anomalum McLachlan, 1876). Systematic list of caddisflies collected at sixteen stations in the Karadak Mountains (Kosovo and Macedonia) during the period September 2016 June 2017. Details about sampling stations are given in Tab. 1.

Nat. Croat. Vol. 27(1), 2018 147 Family Rhyacophilidae Rhyacophila fischeri Botosaneanu 1957 S5 Tributary of Vardar River in Brodec Village, Macedonia: 23.06.2017. 2, 2 ; S14 Stream above Brodec village, Macedonia: 23.06.2017. 1 ; S15 Streamlet before Tanushë village, Macedonia: 03.06.2017. 2 ; 04.06.2017. 3, 1 ; 23.06.2017. 3. Rhyacophila obliterata McLachlan, 1863 S1 Tributary of Morava River in Binçë village, Kosovo: 27.11.2016. 1. S9 Lugu i Kopilaqës streamlet in Dëbëlldeh village, Kosovo: 27.11.2016. 2. S4 Tributary of Morava River in Letnicë village, Kosovo: 04.11.2016. 3. S11 Morava River in Korbliq village, Kosovo: 30.10.2016. 3. S14 Stream in Dërmjak village, Kosovo: 02.10.2016. 1 2. Rhyacophila fasciata Hagen, 1859 S2 Tributary of Morava River in Shushtë village, Kosovo: 30.10.2016. 1. S3 Morava River in Viti town, Kosovo: 30.10.2016. 13 ; 02.10.2016. 6 3. S4 Tributary of Morava River in Letnicë village, Kosovo: 9 2. S9 Lugu i Kopilaqës streamlet in Dëbëlldeh village, Kosovo: 27.11.2016. 4. S12 Zhegër stream in Stanqiq village, Kosovo: 09.10.2016. 1. Rhyacophila nubila Zetterstedt, 1840 S11 Morava River in Korbliq village, Kosovo: 30.10.2016. 2. Family Philopotamidae Philopotamus montanus (Donovan, 1813) S5 Tributary of Vardar River in Brodec Village, Macedonia: 25.09.2016. 5 1. S13 Stream in Dërmjak village, Kosovo: 02.10.2016. 2. S15 Streamlet before Tanushë village, Macedonia: 25.09.2016. 1. Wormaldia occipitalis (Pictet, 1834) S12 Zhegër stream in Stanqiq village, Kosovo: 09.10.2016. 1. S15 Streamlet before Tanushë village, Macedonia: 25.09.2016. 1. S14 Stream above Brodec village, Macedonia: 25.09.2016. 4 2. Family Limnephilidae Micropterna nycterobia McLachlan, 1875 S1 Tributary of Morava River in Binçë village, Kosovo: 27.11.2016. 2. S7 River in Dëbëlldeh village, Kosovo: 27.11.2016. 2. S9 Lugu i Kopilaqës streamlet in Dëbëlldeh village, Kosovo: 27.11.2016. 1. Micropterna sp. S1 Tributary of Morava River in Binçë village, Kosovo: 27.11.2016. 1 Limnephilus lunatus Curtis, 1834 S2 Tributary of Morava River in Shushtë village, Kosovo: 30.10.2016. 1. S4 Tributary of Morava River in Letnicë village, Kosovo: 04.11.2016. 1. Stenophylax meridiorientalis Malicky, 1982 S1 Tributary of Morava River in Binçë village, Kosovo: 27.11.2016. 1.

148 Bilalli, A. et al.: First records of the caddisfly fauna (Insecta: Trichoptera) from the Karadak Mts, Western Balkans Halesus digitatus (Schrank, 1781) S1 Tributary of Morava River in Binçë village, Kosovo: 27.11.2016. 1. S3 Morava River in Viti town, Kosovo: 30.10.2016. 1. S6 Tributary of Zhegër stream in Zhegër village, Kosovo: 30.10.2016. 3. S8 Llapushnicë River in Pogragjë village, Kosovo: 27.11.2016. 1. S11 Morava River in Korbliq village, Kosovo: 30.10.2016. 1. Potamophylax pallidus (Klapálek, 1899) S5 Tributary of Vardar River in Brodec Village, Macedonia: 25.09.2016. 2. Drusus botosaneanui Kumanski, 1968 S10 Streamlet before Brodec village, Macedonia: 25.09.2016. 1. Chaetopteroides sp. S15 Streamlet before Tanushë village, Macedonia: 21.09.2016 1 ; 25.09.2016 2. S9 Lugu i Kopilaqës streamlet in Dëbëlldeh village, Kosovo: 27.11.2016. 1. Chaetopteryx bosniaca Marinkovic-Gospodnetic, 1959 S9 Lugu i Kopilaqës streamlet in Dëbëlldeh village, Kosovo: 27.11.2016. 1 1. Chaetopteryx gonospina Marinkovic-Gospodnetic, 1966 S7 River in Dëbëlldeh village, Kosovo: 27.11.2016. 1. Family Uenoidae Thremma anomalum McLachlan, 1876 S14 Stream above Brodec village, Macedonia: 25.09.2016. 3. Family Leptoceridae Mystacides azurea (Linnaeus, 1761) S16 Stream in Tabanovc village, Macedonia: 21.09.2016. 1. DISCUSSION During this investigation we found two species which are quite rare in the Balkan Peninsula: Chaetopteryx gonospina and Rhyacophila fischeri. Chaetopteryx gonospina was described from Bosnia and Herzegovina and is reported for the first time from Kosovo. It was found at Station S7 in Dëbëlldeh village close to the border with Macedonia. This species has a disjunct distribution and is currently known only from Ecoregions 2 and 5 according to Illies (Illies, 1978), i.e. from the Iberian Peninsula, Croatia, Bosnia and Herzegovina and recently Montenegro (González & Martínez, 2011; Kučinić et al., 2013; Malicky, 2017; Oláh & Kovács, 2012). Our finding in Kosovo is the first record for Ecoregion 6. Like other species of the genus Chaetopteryx Stephens, 1837, this species is also associated with the upper courses of small streams. Chaetopteryx gonospina was previously found at different altitudes, from 500 m a.s.l. up to the alpine area. During our investigation it was found at 982 m a.s.l. Very close to the locality where C. gonospina was found, we sampled another species of the genus Chaetopteryx, Chaetopteryx bosniaca. This species is also rare in Kosovo and is known from 5 localities at different altitudes (Ibrahimi et al., 2012a, 2014a, 2015a, b). This is the first time that two species of the genus Chaetopteryx are recorded at such

Nat. Croat. Vol. 27(1), 2018 149 close proximity in Kosovo. One male and one female specimen belonging to the genus Chaetopteroides were also collected in the same area but at the Macedonian side of the Karadak Mts. Species of these two genera prefer spring areas or the upper reaches of small to medium streams, without pollution, which are well shaded by riparian and nearby vegetation. Rhyacophila fischeri was originally described from Romania and is currently known from Ecoregions 5, 7 and 10 (Graf et al., 2008). During this investigation we report it for the first time from Ecoregion 6; it is also the first record for the Republic of Macedonia based on reliable adult specimens. Although reported from Fauna Europaea as present in Macedonia, we could not trace any record in published literature about caddisflies of Macedonia based on adult specimens. This species is reported from a variety of altitudes, from 500 m up to 1900 m a.s.l. and is mainly associated with upper reaches of mountainous streams (Graf et al., 2008). During our investigation we found it in three localities: S5, S14 and S15 in altitudes from 950 m up to 1358 m a.s.l.. All localities are situated in beech forests. In Kosovo more than 10 localities of this species are currently known (Ibrahimi et al., 2012b). This investigation contributes to the knowledge on the faunistics and distribution of several other rare, endangered and endemic species such as: Chaetopteryx bosniaca, Drusus botosaneanui, Rhyacophila nubila, R. obliterata, and Stenophylax meridiorientalis. Based on our preliminary results, the Karadak Mts. are home to an interesting caddisfly community. This investigation adds to the distributional patterns and ecological information regarding caddisflies of a rarely studied area in the Balkans, namely Kosovo and Macedonia (e.g. Ibrahimi et al., 2012a, b, 2014a, b; Rimcheska et al., 2015; Slavevska-Stamenković et al., 2016). ACKNOWLEDGEMENT We would like to thank two reviewers, Wolfram Graf and Ana Previšić, whose comments significantly improved this manuscript. Received October 30, 2017 REFERENCES Gashi, A., Ibrahimi, H., Grapci-Kotori, L., Sejdiu, N. & Bislimi, K., 2015: New Records of Drusus siveci Malicky, 1981 (Trichoptera, Limnephilidae, Drusinae) from the Balkan Peninsula, with Ecological Notes. Acta Zoologica Bulgarica 67 (2), 259-264. González, M. & Martínez, J., 2011: Checklist of the caddisfies of the Iberian Peninsula and Balearic Islands (Trichoptera). Zoosymposia 5, 115 135. Graf, W., Murphy, J., Dahl, J., Zamora-Muñoz C. & López-Rodríguez, J. M., 2008: Trichoptera. In: Distribution and Ecological Preferences of European Freshwater Organisms. Series Ed. Schmidt-Kloiber, A. & Hering, D. 1, 1-388. Ibrahimi, H., Kučinić, M., Vitecek, S., Waringer, J., Graf, W., Previšić, A., Bálint, M. & Keresztes, L., Pauls, S.U., 2015a: New records for the Kosovo caddisfly fauna with the description of a new species, Drusus dardanicus sp. nov. (Trichoptera: Limnephilidae). Zootaxa 4032, 551-568. DOI:10.11646/zootaxa.4032.5.5 Ibrahimi, H., Gashi, A., Grapci-Kotori, L., Zhushi-Etemi, F., Bilalli, A. & Musliu, M., 2015b: New Distribution and Species Records of Caddisflies (Insecta: Trichoptera) from the Republic of Kosovo. Entomological News 125 (4), 229-238.

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